Question

in a typical greyhound race, a dog accelerates to a speed of 25 m/s over a distance of 30 m. it then maintains this speed. part a choose a motion diagram showing the dogs position and its velocity vectors.

Explanation:

Step1: Analyze acceleration phase

During the first 30 m, the dog accelerates to a speed of 25 m/s. This means the velocity vectors should be getting longer as the dog speeds up over this distance.

Step2: Analyze constant - speed phase

After 30 m, the dog maintains a constant speed. So, the velocity vectors should be of equal length for the rest of the motion.

Answer:

The motion - diagram where the velocity vectors are getting longer for the first 30 m (acceleration phase) and then are of equal length for the remaining distance (constant - speed phase) is the correct one. Without seeing the actual vector lengths in the given diagrams, a general description is that the diagram with increasing - length velocity vectors for the first 30 m and then equal - length velocity vectors after 30 m is appropriate.